feat(review): 实现复习内容滚动展示与交互

- Welcome.vue 新增复习内容水平滚动条，展示报告/残片摘要
- 新增 ReviewDetail.vue 复习详情页，展示完整内容及会话上下文
- 新增 review.ts API 模块，路由注册 /review/detail/:type/:id

src/router/index.ts

@@ -27,6 +27,11 @@ const routes: RouteRecordRaw[] = [
     component: () => import("@/components/Review.vue"),
     meta: { requiresAuth: true },
   },
+  {
+    path: "/review/detail/:type/:id",
+    component: () => import("@/components/ReviewDetail.vue"),
+    meta: { requiresAuth: true },
+  },
   {
     path: "/start-task/:taskNum",
     name: "start-task",